Okay thanks, but thats basically how far i got myself.
Perhaps i should specify: There are a number of video-podcasts that work fine, but a lot more rss-feeds that are (as far as i can tell) technically not podcasts, but still contain references to video-files. Those are the ones i want to get to work.
I was mistaken on the one podcast from ard, but the zdf one http://www.zdf.de/ZDFmediathek/rss/500?view=rss
really doesnt work. I saw the examples from the podcast gallery, but i find learning from those alone not very easy, thats why I thought there might be some kind of tutorial. If there is none i can still try myself.